Only from university how difficult it was to make a good career. A. when did I graduate; I

问题补充：

Only from university how difficult it was to make a good career.

A. when did I graduate; I realized

B. when did I graduate; did I realize

C. when I graduate; did I realize

D. when I graduated; did I realize

答案：

A. when did I graduate; I realized

B. when did I graduate; did I realize

C. when I graduate; did I realize

D. when I graduated; did I realize

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